act 4 scene 4

Hamlet spends a soliloquy berating his cowardly inaction. He wishes he was more like young Fortinbras who can find "quarrel in a straw". Instead Hamlet finds himself overthinking things and backing down from a fight,

But I am pigeon-livered and lack gall. To make oppression bitter, or ere this. I should have fatted all the region kites.